Laboratory tests revealed a nephrotic syndrome (serum albumin 2.4 g/dL, proteinuria 3.5 g/24) with preserved renal function (serum creatinine 1 mg/dL), without hematuria or leukocyturia, and poorly regenerative anemia (hemoglobin 6.3 g/dL, reticulocytes 136 G/L, platelets 882 G/L) without vitamin deficiency. The gene discussed is ALB; the disease is vitamin deficiency.